forked from Github_Repos/cvw
70e207e010
As I was reviewing the busfsm I found a typo. assign UnCachedLSUBusRead = (BusCurrState == STATE_BUS_READY & UnCachedAccess & LSURWM[1] & IgnoreRequest) | (BusCurrState == STATE_BUS_UNCACHED_READ); It should be assign UnCachedLSUBusRead = (BusCurrState == STATE_BUS_READY & UnCachedAccess & LSURWM[1] & ~IgnoreRequest) | (BusCurrState == STATE_BUS_UNCACHED_READ); There is a ~ missing before IgnoreRequest. I restarted the FPGA and had it trigger on the specific faulting event. Sure enough the bus makes an IFUBusRead, which UncachedLSUBusRead feeds into. The specific instruction in the fetch stage had an ITLBMiss with a physical address in an unmapped area which is interpreted as an uncached operation. IgnoreRequest is is high if there is a TrapM | ITLBMissF. Without the & ~IgnoreRequest the invalid address translation makes the request. |
||
|---|---|---|
| .. | ||
| config | ||
| misc | ||
| regression | ||
| src | ||
| srt | ||
| testbench | ||